Views: 52 Author: Chaos Publish Time: 2024-02-19 Origin: Site
The EN 10253-4 standard is a production specification document for stainless steel butt welded pipe fittings, which specifies the dimensions, tolerance, and material properties of stainless steel butt welded pipe fittings. Stainless steel butt welded pipe fittings are widely used pipeline connecting components in the industrial field, made of stainless steel material, with corrosion resistance and high temperature resistance.
Performance Requirement
The EN 10253-4 standard for stainless steel butt welded pipe fittings also specifies the mechanical properties and testing methods of the fittings, such as tensile strength, yield strength, elongation, etc., to ensure that the fittings can withstand sufficient pressure and stress during use.
The EN10253-4 stainless steel butt welded pipe standard includes more than 20 European standard stainless steel materials, including X2CrNi18-9（1.4307）、X2CrNi19-11（1.4306）、X2CrNiN18-10（1.4311）、X5CrNi18-10（1.4301）、X6CrNiTi18-10（1.4541）、X6CrNiNb18-10（1.4550）、X1CrNi25-21（1.4335）、X2CrNiMo17-12-2（1.4404）。Stainless steel material.The following is a table of chemical composition and mechanical performance parameters for each material grade.
Chemical Composition
| Table 3 — Chemical composition (cast analysis)a of austenitic stainless steels, in % by mass | ||||||||||||||
| Steel grade | C max | Si max | Mn max | P max | S max | N | Cr | Cu | Mo | Nb | Ni | Ti | Others | |
| Steel name | Steel number | |||||||||||||
| X2CrNi18-9 | 1.4307 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 17.50-19.50 | _ | _ | _ | 8.00-10.00 | _ | _ |
| X2CrNi19-11 | 1.4306 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 18.00-20.00 | _ | _ | _ | 10.00-12.00 | _ | _ |
| X2CrNiN18-10 | 1.4311 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | 0.12-0.22 | 17.00-19.50 | _ | _ | _ | 8.50-11.50 | _ | _ |
| X5CrNi18-10 | 1.4301 | 0.07 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 17.00-19.50 | _ | _ | _ | 8.00-10.50 | _ | _ |
| X6CrNiTi18-10 | 1.4541 | 0.08 | 1.00 | 2.00 | 0.045b | 0.015b | _ | 17.00-19.00 | _ | _ | _ | 9.00-12.00 | 5xC-0.70 | _ |
| X6CrNiNb18-10 | 1.4550 | 0.08 | 1.00 | 2.00 | 0.045b | 0.015b | _ | 17.00-19.00 | _ | _ | 10xC- 1.00 | 9.00-12.00 | _ | _ |
| X1CrNi25-21 | 1.4335 | 0.020 | 0.25 | 2.00 | 0.025 | 0.010 | ≤ 0.11 | 24.00-26.00 | _ | ≤ 0.20 | _ | 20.00-22.00 | _ | _ |
| X2CrNiMo17-12-2 | 1.4404 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 16.50-18.50 | _ | 2.00-2.50 | _ | 10.00-13.00 | _ | _ |
| X5CrNiMo17-12-2 | 1.4401 | 0.07 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 16.50-18.50 | _ | 2.00-2.50 | _ | 10.00-13.00 | _ | _ |
| X6CrNiMoTi17-12-2 | 1.4571 | 0.08 | 1.00 | 2.00 | 0.045b | 0.015b | _ | 16.50-18.50 | _ | 2.00-2.50 | _ | 10.50-13.50 | 5xC-0.70 | _ |
| X2CrNiMo17-12-3 | 1.4432 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 16.50-18.50 | _ | 2.50-3.00 | _ | 10.50-13.00 | _ | |
| X2CrNiMoN17-13-3 | 1.4429 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | 0.12-0.22 | 16.50-18.50 | _ | 2.50-3.00 | _ | 11.00-14.00 | _ | _ |
| X3CrNiMo17-13-3 | 1.4436 | 0.05 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 16.50-18.50 | _ | 2.50-3.00 | _ | 10.50-13.00 | _ | _ |
| X2CrNiMo18-14-3 | 1.4435 | 0.030 | 1.00 | 2.00 | 0.045b | 0.015b | ≤ 0.11 | 17.00-19.00 | _ | 2.50-3.00 | _ | 12.50-15.00 | _ | _ |
| Table 3 (end) | |||||||||||||||
| Steel grade | C max | Si max | Mn max | P max | S max | N | Cr | Cu | Mo | Nb | Ni | Ti | Others | ||
| Steel name | Steel number | ||||||||||||||
| X2CrNiMoN17-13-5 | 1.4439 | 0.030 | 1.00 | 2.00 | 0.040b | 0.015b | 0.12-0.22 | 16.50-18.50 | _ | 4.00-5.00 | _ | 12.50-14.50 | _ | _ | |
| X2CrNiMo18-15-4 | 1.4438 | 0.030 | 1.00 | 2.00 | 0.040b | 0.015b | ≤ 0.11 | 17.50-19.50 | _ | 3.00-4.00 | _ | 13.00-16.00 | _ | _ | |
| X1NiCrMoCu31-27-4 | 1.4563 | 0.020 | 0.70 | 2.00 | 0.030 | 0.010 | ≤ 0.11 | 26.00-28.00 | 0.70-1.50 | 3.00-4.00 | _ | 30.00-32.00 | _ | _ | |
| X1NiCrMoCu25-20-5 | 1.4539 | 0.020 | 0.70 | 2.00 | 0.030 | 0.010 | ≤ 0.15 | 19.00-21.00 | 1.20-2.00 | 4.00-5.00 | _ | 24.00-26.00 | _ | _ | |
| X1CrNiMoCuN20-18-7 | 1.4547 | 0.020 | 0.70 | 1.00 | 0.030 | 0.010 | 0.18-0.25 | 19.50-20.50 | 0.50-1.00 | 6.00-7.00 | _ | 17.50-18.50 | _ | _ | |
| X1NiCrMoCuN25-20-7 | 1.4529 | 0.020 | 0.50 | 1.00 | 0.030 | 0.010 | 0.15-0.25 | 19.00-21.00 | 0.50-1.50 | 6.00-7.00 | _ | 24.00-26.00 | _ | _ | |
| a Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel. b For fittings welded without filler material the sum of sulphur and phosphorus shall be maximum 0,040 %. |
| Table 4 — Chemical composition (cast analysis)a of austenitic-ferritc stainless steels, in % by mass | ||||||||||||
| Steel grade | C max | Si max | Mn max | P max | S max | N | Cr | Cu | Mo | Ni | Others | |
| Steel name | Steel number | |||||||||||
| X2CrNiMoN22-5-3 | 1.4462 | 0.030 | 1.00 | 2.00 | 0.035 | 0.015 | 0.10-0.22 | 21.00-23.00 | _ | 2.50-3.50 | 4.50-6.50 | _ |
| X2CrNiN23-4b | 1.4362 | 0.030 | 1.00 | 2.00 | 0.035 | 0.015 | 0.05-0.20 | 22.00-24.00 | 0.10-0.60 | 0.10-0.60 | 3.50-5.50 | _ |
| X2CrNiMoN25-7-4b | 1.4410 | 0.030 | 1.00 | 2.00 | 0.035 | 0.015 | 0.20-0.35 | 24.00-26.00 | _ | 3.00-4.50 | 6.00- 8.00 | _ |
| X2CrNiMoCuWN25-7-4 | 1.4501 | 0.030 | 1.00 | 1.00 | 0.035 | 0.015 | 0.20-0.30 | 24.00-26.00 | 0.50-1.00 | 3.00-4.00 | 6.00-8.00 | W 0.50- 1.00 |
| X2CrNiMoCuN25-6-3 | 1.4507 | 0.030 | 0.70 | 2.00 | 0.035 | 0.015 | 0.15-0.30 | 24.00-26.00 | 1.00-2.50 | 2.70-4.00 | 5.50-7.50 | _ |
| a Elements not listed in this table shall not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate precautions are to be taken to avoid the addition of such elements from scrap and other materials used in production which would impair mechanical properties and the suitability of the steel. b Patented steel grade |
| Table 5 — Permissible deviations of the product analysis from specified limits on cast analysis given in Tables 3 and 4 | ||
| Element | Limiting value for the cast analysis in accordance width Tables 3 and 4 % by mass | Permissible deviation of the product analysis a % by mass |
| Carbon | ≤ 0.030 | + 0.005 |
| > 0.030 ≤ 0.08 | ± 0.01 | |
| Silicon | ≤ 1.00 | ± 0.05 |
| Manganese | ≤ 1.00 | + 0.03 |
| > 1.00 ≤ 2.00 | + 0.04 | |
| Phosphorus | ≤ 0.030 | + 0.003 |
| > 0.030 to ≤ 0.045 | + 0.005 | |
| Sulphur | ≤ 0.015 | + 0.003 |
| Nitrogen | ≤ 0.35 | ± 0.01 |
| Chromium | ≥ 10.50 ≤ 15.00 | ± 0.15 |
| > 15.00 ≤ 20.00 | ± 0.20 | |
| > 20.00 ≤ 28.00 | ± 0.25 | |
| Copper | ≤ 1.00 | ± 0.07 |
| > 1.00 ≤ 2.50 | ± 0.10 | |
| Molybdenum | ≤ 0.60 | ± 0.03 |
| > 0.60 ≤ 1.75 | ± 0.05 | |
| > 1.75 ≤ 7.00 | ± 0.10 | |
| Niobium | ≤ 1.00 | ± 0.05 |
| Nickel | ≤ 1.00 | ± 0.03 |
| >1.00 ≤ 5.00 | ± 0.07 | |
| > 5.00 ≤ 10.00 | ± 0.10 | |
| > 10.00 ≤ 20.00 | ± 0.15 | |
| > 20.00 ≤ 32.00 | ± 0.20 | |
| Titanium | ≤ 0.70 | ± 0.05 |
| Tungsten | ≤ 1.00 | ± 0.05 |
| a If several product analyses are carried out on one cast, and the contents of an individual element determined lie outside the permissible range of the chemical composition specified for the cast analysis, then it is only allowed to exceed the permissible maximum value or to fall short of the permissible minimum value, but not both for one cast. |
Mechanical Properties
| Table 6 — Mechanical properties for wall thicknesses up to 60 mm at room temperature and impact properties at − 196 °C of austenitic stainless steels in the solution annealed condition (+AT), heat treatment and information about resistance to intergranular corrosion | |||||||||||||||
| Steel grade | Hardness HB max | Tensile properties at room temperatureb | Impact propertiesa Minimum average absorbed energy KV J min | Reference heat treatment conditions | Resistance to intergranular corrosion | Limit temp. °Ci | |||||||||
| Proof strength | Tensile strengthh Rm MPa | Elongationc A % min | |||||||||||||
| Rp0,2 MPa min | Rp1,0 MPa min | Solution temperature d | Cooling in e | f | Method of EN ISO 3651-2 | ||||||||||
| Steel name | Steel number | l | t | at RT l t | at-196 °C t | ||||||||||
| X2CrNi18-9 | 1.4307 | 200 | 180 | 215 | 470-670 | 40 | 35 | 100 | 60 | 60 | 1000-1100 | w, a | yes | A | 350 |
| X2CrNi19-11 | 1.4306 | 200 | 180 | 215 | 460-680 | 40 | 35 | 100 | 60 | 60 | 1000-1100 | w, a | yes | A | 350 |
| X2CrNiN18-10 | 1.4311 | 210 | 270 | 305 | 550-760 | 35 | 30 | 100 | 60 | 60 | 1000-1100 | w, a | yes | A | 400 |
| X5CrNi18-10 | 1.4301 | 200 | 195 | 230 | 500-700 | 40 | 35 | 100 | 60 | 60 | 1000-1100 | w, a | yesg | A | 300 |
| X6CrNiTi18-10 | 1.4541 | 210 | 200 | 235 | 500-730 | 35 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X6CrNiNb18-10 | 1.4550 | 210 | 205 | 240 | 510-740 | 35 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X1CrNi25-21 | 1.4335 | 220 | 180 | 210 | 470-670 | 45 | 40 | 100 | 60 | 60 | 1030-1110 | w, a | yes | A | 400 |
| X2CrNiMo17-12-2 | 1.4404 | 200 | 190 | 225 | 490-690 | 40 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X5CrNiMo17-12-2 | 1.4401 | 200 | 205 | 240 | 510-710 | 40 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yesg | A | 300 |
| X6CrNiMoTi17-12-2 | 1.4571 | 210 | 210 | 245 | 500-730 | 35 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X2CrNiMo 17-12-3 | 1.4432 | 200 | 190 | 225 | 490-690 | 40 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X2CrNiMoN17-13-3 | 1.4429 | 220 | 295 | 330 | 580-800 | 35 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X3CrNiMo17-13-3 | 1.4436 | 200 | 205 | 240 | 510-710 | 40 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yesg | A | 300 |
| X2CrNMo18-14-3 | 1.4435 | 200 | 190 | 225 | 490-690 | 40 | 30 | 100 | 60 | 60 | 1020-1120 | w, a | yes | A | 400 |
| X2CrNiMoN17-13-5 | 1.4439 | 200 | 285 | 315 | 580-800 | 35 | 30 | 100 | 60 | 60 | 1100-1140 | w, a | yes | C | 400 |
| X2CrNiMo18-15-4 | 1.4438 | 200 | 220 | 250 | 490-690 | 35 | 30 | 100 | 60 | 60 | 1100-1160 | w, a | yes | C | 400 |
| X1CrMoCu31-27-4 | 1.4563 | 220 | 215 | 245 | 500-750 | 40 | 35 | 120 | 90 | 60 | 1100-1160 | w, a | yes | C | 400 |
| Table 6 (end) | |||||||||||||||
| Steel grade | Hardness HB max | Tensile properties at room temperatureb | Impact propertiesa Minimum average absorbed energy KV J min | Reference heat treatment conditions | Resistance to intergranular corrosion | Limit temp. °Ci | |||||||||
| Proof strength | Tensile strengthh Rm MPa | Elongationc A % min | |||||||||||||
| Rp0,2 MPa min | Rp1,0 MPa min | Solution temperature d | Cooling in e | f | Method of EN ISO 3651-2 | ||||||||||
| Steel name | Steel number | l | t |  at RTl t | at-196 。C t | ||||||||||
| X1NiCrMoCu25-20-5 | 1.4539 | 220 | 220 | 250 | 520-720 | 35 | 30 | 120 | 90 | 60 | 1100-1150 | w, a | yes | C | 400 |
| X1CrNiMoCuN20-18-7 | 1.4547 | 220 | 300 | 340 | 650-850 | 35 | 30 | 100 | 60 | 60 | 1180-1230 | w, a | yes | C | 400 |
| X1NiCrMoCuN25- 20-7 | 1.4529 | 220 | 300 | 340 | 600-800 | 40 | 40 | 120 | 90 | 60 | 1120-1180 | w, a | yes | C | 400 |
| a | For wall thicknesses greater than 60 mm the mechanical properties are subject to agreement at the time of enquiry and order. Option 7: Agreed mechanical properties for wall thicknesses greater than 60 mm apply. | ||||||||||||||
| b | l = longitudinal ; t = transverse. | ||||||||||||||
| c | See also 7.2.3.1. | ||||||||||||||
| d | The maximum temperatures are for guidance only. | ||||||||||||||
| e | w = water ; a = air ; cooling sufficiently rapid. | ||||||||||||||
| f | When tested in accordance with EN ISO 3651-2 (Appropriate method, A or B or C, shall be as indicated) up to the limit temperatures indicated in the last column of table 8. | ||||||||||||||
| g | In delivery condition. (Normally not fulfilled in the sensitized condition). | ||||||||||||||
| h | For the delivery conditions W 0, W 1 and W 2 which do not include solution annealing, the upper Rm limit may be exceeded by 70 MPa . | ||||||||||||||
| i | Up to these temperatures, the material should, within 100 000 h, not have changed so as to show susceptibility of intergranular corrosion, when tested in conformity with EN ISO 3651-2. | ||||||||||||||
| Table 7 — Mechanical properties for wall thicknesses up to 30 mm at room temperature and impact properties at - 40。C of austenitic-ferritic stainless steel in the solution annealed condition (+AT), heat treatment and information about resistance to intergranular corrosion | ||||||||||||||
| Steel grade | Hardness HB max | Tensile properties at room temperaturea | Impact propertiesa | Reference heat treatment conditions | Resistance to intergranular corrosion | Limit temp. f °C | ||||||||
| Proof strengt h Rp0,2 MPa min | Tensile strength Rm MPa | Elongationb A % min l t | Minimum average absorbed energy KV J min | |||||||||||
| Steel name | Steel number | Solution temperature c | Cooling ind | e | Method in EN ISO 3651-2 | |||||||||
| at RT | at -40 。C t | |||||||||||||
| l | t | |||||||||||||
| X2CrNiMoN22-5-3 | 1.4462 | 290 | 450 | 700-920 | 25 | 20 | 120 | 90 | 40 | 1020-1100 | w, a | yes | B | 250 |
| X2CrNiN23-4 | 1.4362 | 290 | 400 | 600-820 | 25 | 25 | 120 | 90 | 40 | 950-1050 | w, a | yes | A | 250 |
| X2CrNiMoCuN25-6-3 | 1.4507 | 310 | 500 | 700-900 | 20 | 20 | 100 | 100 | 40 | 1080-1160 | w | yes | B | 250 |
| X2CrNiMoN25-7-4 | 1.4410 | 310 | 550 | 800-1000 | 20 | 20 | 100 | 100 | 40 | 1040-1120 | w | yes | B or C | 250 |
| X2CrNiMoCuWN 25-7-4 | 1.4501 | 310 | 550 | 800-1000 | 20 | 20 | 100 | 100 | 40 | 1080-1160 | w | yes | B or C | 250 |
| a | l = longitudinal ; t = transverse. | |||||||||||||
| b | See also 7.2.3.1. | |||||||||||||
| c | The maximum temperatures are for guidance only. | |||||||||||||
| d | w = water ; a = air ; cooling sufficiently rapid. | |||||||||||||
| e | When tested in accordance with EN ISO 3651-2 (Appropriate method, A or B or C, shall be as indicated) up to 250 °C. | |||||||||||||
| f | Up to these temperatures, the material should, within 100 000 h, not have changed so as to show susceptibility of intergranular corrosion, when tested in conformity with EN ISO 3651-2. | |||||||||||||
Types Of EN10253-4 Stainless Steel Butt Welded Pipe Fittings
Stainless steel fittings are commonly used to connect different parts of pipeline systems to ensure smooth fluid or gas transmission. According to the EN 10253-4 standard, the dimensions of stainless steel fittings should comply with the standard provisions to ensure interchangeability and assembly accuracy of the fittings. At the same time, the material requirements for pipe fittings should also comply with standard regulations to ensure the quality and reliability of the fittings.
The EN10253-4 standard includes various types of stainless steel butt welded pipe fittings, including 45 degree elbows, 90 degree elbows, 180 degree elbows, equal tees, reducing tees, concentric reducers, eccentric reducers, and caps.
The EN10253-4 standard has important guiding significance for the manufacturing and use of stainless steel fittings, ensuring the quality and reliability of fittings, and ensuring the normal operation and safety of pipeline systems. When selecting pipeline fittings, specific application requirements such as pressure, temperature, fluid characteristics, mechanical loads, and cost should be considered. In addition, the specific selection should also be based on the suggestions of engineers or designers to ensure that the selected fittings meet the requirements of the project.
